"We all four felt that, after some 35 years, it could be fun to join forces again and go into the recording studio," the band noted. "So we did. And it was like time had stood still and that we only had been away on a short holiday."

Two new songs are coming from ABBA, seen here performing "Waterloo" during the Eurovision Song Contest in 1974. (AFP/AFP/Getty Images)

Since the pop icons split in 1982, they have worked together on projects including the blockbuster stage musical "Mamma Mia!" that became a hit movie. The sequel hits multiplexes this summer.

But there's not been new music from ABBA, who broke through with a win at the 1974 Eurovision Song Contest with "Waterloo." Since then, hits include "Dancing Queen" and "Fernando."

The group recently announced that they'll be touring in the form of virtual holograms in 2019.